.extra {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 14;
  background-image: linear-gradient(135deg, #93a5cf 0%, #e4efe9 100%);;
  padding: 2em 2em 2em 2em;
  box-sizing: border-box;
}

.extra_top {
  padding: 0 0 0 0;
  display: flex;
  height: 10%;
}

.extra_top_icon {
  padding: 0.6em 0.6em 0 0.6em;
  border-radius: 1000px;
  transform: translate(0, -13px);
  cursor: pointer;
}

.extra_top_icon:hover {
  background: rgba(255, 255, 255, 0.25);
  animation: extra_icon_softin 0.25s ease-out forwards;
}

@keyframes extra_icon_softin {
  0% {
    background: rgba(255, 255, 255, 0);
  }
  100% {
    background: rgba(0, 0, 0, 0.25);
  }
}


.extra_title {
  font-family: "思源宋体", serif;
  height: 100%;
  line-height: 100%;
  font-size: 325%;
  font-weight: bold;
  color: transparent;
  background: linear-gradient(150deg, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 1) 75%, #51A8DD 100%);
  -webkit-background-clip: text;
}

.mainContainer {
  box-sizing: border-box;
  padding: 0 2em 0 2em;
  display: flex;
  height: 92%;
  flex-flow: column;
}

.bgmContainer {
  left: 50px;
  right: 50px;
  bottom: 30px;
  position: absolute;
  overflow: auto;
  //width: 100%;
  //height: 70%;
  box-sizing: border-box;
  display: flex;
  flex-flow: column-reverse;
  align-content: center;
  background-image: linear-gradient(315deg, rgba(163, 189, 237, 0.95) 0%, rgba(105, 145, 199, 0.95) 100%);
  padding: 1em 2em 1em 2em;
  border-radius: 4px;
  transition: max-height 0.5s;
  z-index: 2;
}

.bgmListContainer {
  z-index: 2;
  bottom: 0;
  //overflow: hidden;
  width: 100%;
  box-sizing: border-box;
  display: flex;
  flex: 1;
  flex-flow: row;
  justify-content: flex-start;
  align-items: flex-start;
  margin: 0 0 15px 0;
  flex-wrap: wrap;
  overflow: auto;
}

.bgmPlayerMain {
  display: flex;
}

.bgmControlButton {
  padding: 0.6em 1.2em 0.2em 1.2em;
  margin: 0 5px 0 5px;
  box-sizing: border-box;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: background-color 0.33s, color 0.33s;
  flex-shrink: 0;
}

.bgmControlButton:hover {
  box-shadow: 0 0 10px 5px rgba(255, 255, 255, 0.35);
}

.bgmName {
  color: rgba(255, 255, 255, 0.8);
  font-family: "思源宋体", serif;
  font-size: 155%;
  margin: 5px 5px 0 15px;
  overflow: hidden;
}

.bgmElement {
  font-family: "思源宋体", serif;
  padding: 0.5em 1em 0.5em 1em;
  overflow: hidden;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 5px;
  color: white;
  font-size: 125%;
  margin: 0.5em 1em 0.5em 0.5em;
  transition: background-color 1s, color 1s;
  opacity: 1;
  //animation: bgmElement_In 0.5s forwards ease-out;
  cursor: pointer;
  width: 28%;
  flex-shrink: 0;
}

@keyframes bgmElement_In {
  0% {
    opacity: 0.95;
    //transform: translate(-50px, 0);
  }
  100% {
    opacity: 1;
  }
}

.bgmElement:hover {
  background-color: rgba(255, 255, 255, 0.65);
  color: #666;
  transition: background-color 0.5s, color 0.5s;
}

.bgmElement_active {
  background-color: rgba(255, 255, 255, 0.85) !important;
  color: #666;
}

.cgMain {
  width: 100%;
  height: 88%;
}

.cgContainer {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: flex-start;
  align-content: flex-start;
  height: 90%;
  box-sizing: border-box;
  padding: 4em 0 0 2em;
}

.cgElement {
  width: 22.5%;
  height: 37.5%;
  background-color: rgba(255, 255, 255, 0.75);
  box-shadow: 0 0 15px 5px rgba(0, 0, 0, 0.35);
  box-sizing: border-box;
  padding: 0.75em 0.75em 0.75em 0.75em;
  opacity: 0;
  margin: 1em 1em 1em 1em;
  animation-delay: 100ms;
  z-index: 1;
  position: relative;
  cursor: pointer;
}

.cgShowDiv {
  height: 8%;
  width: 100%;
  display: flex;
  flex-flow: row;
  justify-content: center;
  align-items: flex-end;
}

.cgShowDivWarpper {
  display: flex;
  flex-flow: row;
  justify-content: center;
  align-items: flex-end;
  //background: rgba(255, 255, 255, 0.35);
  border-radius: 7px;
  padding: 12px 15px;
}

.cgNav {
  font-size: 170%;
  background-color: rgba(255,255,255,0.5);
  color: #666;
  padding: 0.12em 1em 0.12em 1em;
  margin: 0 0.25em 0 0.25em;
  //width: 20px;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.5s, color 0.5s, font-weight 0.5s;
  border-radius: 7px;
}

.cgNav:first-child {
  margin-left: 0;
}

.cgNav:last-child {
  margin-right: 0;
}

.cgNav_active {
  background-color: rgba(255,255,255,0.7) !important;
  color: #005CAF;
}

.cgNav:hover {
  color: #005CAF;
  background-color: rgba(255,255,255,0.6);
}


.showFullContainer {
  z-index: 13;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: center;
  align-items: center;
}

.showFullCgMain {
  cursor: pointer;
  width: 80%;
  height: 80%;
  box-sizing: border-box;
  padding: 2em 2em 2em 2em;
  background: rgba(255, 255, 255, 0.95);
  animation: fullCgIn 0.5s ease-out forwards;
  opacity: 0;
}

$initialTransform: scale(1.05, 1.05) translate(-25px, -50px) rotateX(-10deg) rotateY(10deg);
$endTransform: scale(1, 1) translate3d(0, 0, 0);

@keyframes fullCgIn {
  0% {
    opacity: 0;
    transform: $initialTransform;
  }
  100% {
    opacity: 1;
    transform: $endTransform;
  }
}
